I built the RIMs tube you reference from ordered parts for about the same prce but used a TriClover for the element so I can clean it easier. You can get all the SS parts from www.murrayequipment.com
Something is always fermenting....
"It's Bahl Hornin'"
Kegged: Sour Saison, Pale Ale, Aggie Ale, Firestone DBA, De Koninck Blonde
Bottled: Belgian Quad (Grand Reserve), Derangement (Belgian Dark Strong)
On Deck: Pliny the Younger